Alright. Truth be told, there are a few things that would need to be added, but I might need accurate translations of the scenes in dummied text as evidence that they exist. I mentioned it in the "Weird Discoveries" thread, but the dummied text seems to also be from a different build of the game based on some of the stuff in there.
Either way, I'll start making the page soon.

Originally posted by ExitDoor62Thank you for translating. It's nice to get that suspicion confirmed.
Can I mention it on the game article, though? Not sure if TCRF covers stuff like outright scrapped ideas.

Prerelease covers that I'd say

Alright. Will a section on the main page work? I don't think there's quite enough to justify a whole page.

Originally posted by ExitDoor62Thank you for translating. It's nice to get that suspicion confirmed.
Can I mention it on the game article, though? Not sure if TCRF covers stuff like outright scrapped ideas.

The question they were asked was
――ゲストキャラクターが戦闘に参加してくれるのも、DS版の新要素ですよね。会話によるヒントだけでなく、戦闘でもサポートさせようとした意図というのは？

Interviewer: One new feature of the DS version is that guest characters can appear in battle scenes. This means they'll actually be helping out in battle, rather than just giving hints and exposition, right?

Asano: At first, we were considering having a fifth party slot.

Tanaka: Because we were remaking the graphics and the encounter balance from scratch anyway, a fifth character wouldn't have been difficult to add. But since you so rarely have a guest character in the party, we didn't want to have to reserve processing power and the like for them. We decided to stick with the main four characters so as not to strain the DS's capabilities and have the guest characters only assist occasionally.

so yes, you're exactly right lol
It's also worth noting this was Square's first DS game so they didn't know how far they could push it yet. 4's remake has a 5-person party and also more than just 3 monster slots.

Based on the online translators I'm using, they seem to be saying that the game originally had a fifth part member slot, but they got rid of it because it would have only been used occasionally and wasn't worth sacrificing the specs for. That might also explain why Desch's sword is an actual item in the code (though that wouldn't explain the lack of Alus' boomerang, Cid's Hammer...).